#17511: Keep IDLE find dialog open after clicking "Find Next".
Original patch by Sarah K.
#17511: merge with 3.3.
Issue #18157: stop using imp.load_module() in imp.
Issue #18158: delete test_importhooks. Redundant in the face of
test_importlib.
typo fix
explanatory comment
Issue #18187: Fix broken link in venv documentation. Patch by Berker Peksag.
Issue #18187: merge from 3.3